Shielded electrostatic probe for nonperturbing plasma measurements in Hall thrusters

D. Staack, Y. Raitses, N. J. Fisch

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33 Scopus citations


The use of shielded electrostatic probe to measure spatial plasma parameters of the quasineutral plasma in Hall thrusters was studied. The probe-induced perturbations could produce changes in the plasma parameters and discharge current on the order of their steady-state values, in Hall thrusters. The perturbations were explored by varying the material, residence time and penetration distance of various probe designs. In a set of experiments with a segmented shield probe, the thruster was operated in the discharge voltages of 200-500 V and input power range of 500 W-2.5 kW, while the probe-induced perturbations of the discharge current were below 4% of its steady-state value.

Original languageEnglish (US)
Pages (from-to)393-399
Number of pages7
JournalReview of Scientific Instruments
Issue number2
StatePublished - Feb 2004

All Science Journal Classification (ASJC) codes

  • Instrumentation


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